(19)

(11)

EP 3 759 745 A2

(12)

(88) Date of publication A3: 03.10.2019 (43) Date of publication: 06.01.2021 Bulletin 2021/01 (21) Application number: 19716472.6 (22) Date of filing: 27.02.2019

(51) International Patent Classification (IPC):  H01L 41/047(2006.01) H01L 41/187(2006.01) H01L 41/332(2013.01) B06B 1/06(2006.01) H01L 41/316(2013.01) (86) International application number: PCT/GB2019/050549 (87) International publication number: WO 2019/166805 (06.09.2019 Gazette 2019/36)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 28.02.2018 GB 201803257 (71) Applicant: Novosound Ltd Newhouse ML51 5UH (GB)	(72) Inventors: HUGHES, David Newhouse ML51 5UH (GB) GIBSON, Desmond Newhouse ML51 5UH (GB) IRVING, Daniel Newhouse ML51 5UH (GB) (74) Representative: McGlashan, Graham Stewart  Marks & Clerk LLP Aurora 120 Bothwell Street Glasgow G2 7JS Glasgow G2 7JS (GB)